Viscosity index improver for lubricant compositions
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United States of America Patent
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Feb 16, 2010
Grant Date -
Sep 7, 2006
app pub date -
Mar 15, 2006
filing date -
Mar 17, 2004
priority date (Note) -
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Abstract
A lubricant composition comprises a base oil and a viscosity modifier including an ethylene/α-olefin interpolymer. The ethylene/α-olefin interpolymer is a block copolymer having at least a hard block and at least a soft block. The soft block comprises a higher amount of comonomers than the hard block. The block copolymer has a number of unique characteristics disclosed here. Such block copolymers offer the possibility of improved low temperature performance and flexibility in formulating motor oil, gear lubricants and greases, etc.
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